<HTML>There are serious side effects to, what can only be described as a rapid change in planetary obliquity.
If the pyramids were built about 4,500 years ago, then these stellar alignment shafts did not point to any particular stars, or certainly not the stars that they are presumed to have pointed to. 4,500 years ago there would have been more than 1° of difference in planetary obliquity. 1° is a vast distance when relating to stellar alignments.
The same can be said of the sphinx, the sphinx would not have been looking at the sunrise on the summer solstice, because there would have been that variation in obliquity. It also upsets the idea of the sphinx looking at any particular star group at dawn during a certain time period in the past</HTML>